Mr Juncker, who has held the position since 2014 said that he will “not run again” in an interview with the German World Service, which will air on Sunday.

Mr Juncker added that he doubted the EU could maintain unity after Britain leaves the union.

"It was a fine election campaign. But there won't be a second one, because I won't be putting myself forward as a candidate for a second time."

EPA

European Commission President Jean-Claude Juncker

He added that he had “fallen back in love with Europe, because I rediscovered the wealth of colours of the European Union”.

The EU mandarin also noted that “there was a lack of basic agreement about things that have to be carried out in Europe”.

Mr Juncker was a conservative Prime Minster of Luxembourg for eight years before taking up the EC post in November 2014 and has now vowed not to stand for a second time when his current five-year term comes to an end in 2019.

"The other EU 27 don't know it yet, but the Brits know very well how they can tackle this," Juncker told Deutschlandfunk radio.

"They could promise country A this, country B that and country C something else and the end game is that there is not a united European front."

He added that Britain could not negotiate trade deals as long as it remained a member of the bloc.

Jean-Claude Juncker is a Luxembourgish politician. Since 2014, Juncker has been President of the European Commission, which is the European Union Executive Branch.

It was a fine election campaign. But there won't be a second one, because I won't be putting myself forward as a candidate for a second time

European Commission President Jean-Claude Juncker

The 62-year-old. who was previously the Prime Minster of Luxembourg, also expressed concerns over Greece’s third bailout programme saying that it could still fall apart as the International Monetary Fund (IMF) had not yet made up its mind whether to take part in providng more aid.

Junker said: ”Yes, it is on a shaky ground in the sense that we don't see how the International Monetary Fund could manage this problem.

"No country has managed bigger steps to improve competitiveness than Greece."

British MPs recently approved the bill giving Prime Minister Theresa May the green light to trigger Article 50 of the Lisbon Treaty that will start the Brexit process.

The European Union (Notification of Withdrawal) Bill passed by 494 votes to 122, a majority of 372 last Wednesday.

The Bill will now pass to the House of Lords before May can act on it.

Mrs May has said that she wants to trigger Article 50 by the end of March.

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Jean-Claude Juncker will not stand again for European Commission President

Only recently Mr Juncker tried to deflect some of the blame for the failures of the EU away from himself, saying that national governments had to take responsibility for decisions made in Brussels.

He told commissioners last week week that the decision-making process had to be “more democratic and transparent”.

He said: ““I want that the Council of Ministers takes political responsibility.”

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Jean-Claude Juncker will not stand for a second term

He has reflected previously on this, saying in his State of the Union address in September: “It is not right that when EU countries cannot decide among themselves … the Commission is forced by Parliament and Council to take a decision.